Charging and power supply device

Abstract

To provide a technique capable of further simply notifying a vehicle side of operation to be performed out of charging operation and power supply operation in a charging / power supply device.SOLUTION: A charging / power supply device 300 includes: a connector 306 connected to a charging / power supply port 170 of a vehicle 100 having a power storage device; a charging path 320 for supplying power from a power supply PS to the vehicle 100 through the connector 306 to charge the power storage device; a power supply path 330 for supplying power from the power storage device to outside of the vehicle 100 through the connector 306; a signal line 370 connected to the vehicle 100 through the connector 306; a resistor circuit 341 having one end connected to GND potential and having a resistance value R1; a resistor circuit 342 having one end connected to the GND potential and having a resistance value R4 different from the R1; and a changeover switch 343 for switching a connection state of the signal line 370 and one of the other end of the resistor circuit 341 and the other end of the resistor circuit 342.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a charging and power supply device.

Background Art

[0002] For example, there is known a charging and power supply device that can perform a charging operation of charging a power storage device of an electric vehicle with electric power from an external power source by connecting to a power interface of the electric vehicle via a connector, and a power supply operation of supplying the electric power of the power storage device to the outside of the electric vehicle (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the vehicle side needs to grasp which of the charging operation and the power supply operation the charging and power supply device performs and be linked to the operation. Therefore, for example, if communication is performed between the charging and power supply device and the vehicle side, the number of components may increase and the configuration may become complicated, such as the need for a microcomputer for communication.

[0005] Therefore, in view of the above problems, an object of the present disclosure is to provide a technique that can more simply notify the vehicle side of the operation to be performed among the charging operation and the power supply operation for the charging and power supply device.

Means for Solving the Problems

[0006] To achieve the above object, in one embodiment of the present disclosure, a housing, a cable provided to extend from the housing, provided at the tip of the cable, a connector connected to a power interface of an electric vehicle having a power storage device, a latch provided on the connector to prevent removal from the power interface, an operation unit provided on the connector to release the latch, provided inside the housing, A first path for supplying power from a predetermined power source to the electric vehicle through the connector to charge the power storage device; provided inside the housing, A second path for supplying power from the power storage device to the outside of the electric vehicle through the connector; a third path provided on the cable in a form in which the first path and the second path merge into one, A signal line connected to the electric vehicle through the connector; provided inside the housing, A first resistor having a first resistance value and one end connected to a constant voltage section; provided inside the housing, One end is connected to the constant voltage section, the A second resistor having a second resistance value different from the first resistance value; provided inside the housing, And a switching section for switching the connection state between the signal line and either the other end of the first resistor or the other end of the second resistor. 、 The first resistance portion changes its resistance value only between the first resistance value corresponding to the state where the connector is attached to the power interface and the latch is effective, and the third resistance value corresponding to the state where the latch is released and different from the first resistance value. The second resistance portion changes its resistance value only between the third resistance value corresponding to the state where the connector is attached to the power interface and the latch is effective, and the fourth resistance value corresponding to the state where the latch is released and different from the second resistance value. There is provided a charging / power feeding device. A charging / power feeding device is provided.

Advantages of the Invention

[0007] According to the above-described embodiment, for the charging / power feeding device, it is possible to more simply notify the vehicle side of the operation to be performed among the charging operation and the power feeding operation.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings.

[0010] [Configuration of Charging and Power Supply System] With reference to FIGS. 1 and 2, the configuration of the charging and power supply system 1 according to this embodiment will be described.

[0011] FIG. 1 is a diagram showing an example of the configuration of the charging and power supply system 1. FIG. 2 is a diagram showing an example of the connector 306. Specifically, FIG. 2 is a diagram showing a specific example of an existing power supply connector that can be adopted as the connector 306.

[0012] As shown in FIG. 1, the charging and power supply system 1 includes a vehicle 100, a house 200, and a charging and power supply device 300.

[0013] The charging and power supply system 1 charges the storage device of the vehicle 100 with the power supplied from the power supply PS (an example of the power supply of the place) of the house 200 through the charging and power supply device 300, and supplies power from the storage device of the vehicle 100 to the house 200.

[0014] [Vehicle] The vehicle 100 (an example of an electric vehicle) is an electric vehicle equipped with a storage device and capable of driving a motor with the power of the storage device to travel.

[0015] The vehicle 100 includes an on-board charger (OBC) 110, a power path 120, an ECU (Electronic Control Unit) 130, signal lines 140 and 150, a resistor 160, and a charging and power supply port 170.

[0016] The on-board charger 110 charges the storage device using the AC power supplied from the charging and power supply device 300 through the power path 120 under the control of the ECU 130. Specifically, the on-board charger 110 converts the single-phase AC input from the power path 120 into DC to charge the storage device.

[0017] In addition, the in-vehicle charger 110 supplies the power of the power storage device to the charging and power supply device 300 through the power path 120 under the control of the ECU 130. Specifically, the in-vehicle charger 110 converts the direct current of the power storage device into alternating current power and outputs it to the power path 120.

[0018] The power path 120 is composed of two power lines. One end of the power path 120 is connected to the in-vehicle charger 110, and the other end is connected to the charging and power supply port 170.

[0019] The power path 120 supplies the alternating current power supplied from the charging and power supply device 300 to the in-vehicle charger 110 through the charging and power supply port 170. In addition, the power path 120 supplies the alternating current power output from the in-vehicle charger 110 to the charging and power supply device 300 through the charging and power supply port 170.

[0020] The ECU 130 controls the in-vehicle charger 110 and controls the charging of the power storage device of the vehicle 100 and the power supply from the power storage device to the outside.

[0021] The ECU 130 is connected to the signal lines 140 and 150.

[0022] The ECU 130 includes a resistor 131.

[0023] The resistor 131 is a pull-up resistor of the signal line 150. One end of the resistor 131 is connected to the internal power supply of the ECU 130, and the other end is connected to the signal line 150.

[0024] One end of the signal line 140 is connected to the ECU 130, and the other end is connected to the charging and power supply port 170.

[0025] One end of the signal line 150 is connected to the ECU 130 and is connected to the resistor 131 through the internal signal line of the ECU 130. In addition, the other end of the signal line 150 is connected to the charging and power supply port 170.

[0026] The resistor 160 is a pull-down resistor of the signal line 150. One end of the resistor 160 is connected to the signal line 150, and the other end is connected to the ground of the vehicle 100.

[0027] The charging and power supply port 170 is the power interface of the vehicle 100. The connector 306 of the charging and power supply device 300 is connected to the charging and power supply port 170.

[0028] <Residence> The residence 200 includes power paths 210, 220, 230, 240 and a self-driving switching device 250.

[0029] The power path 210 is composed of two voltage lines and one neutral line, and supplies single-phase AC power from the power source PS by a single-phase three-wire system. One end of the power path 210 is connected to the power source PS, and the other end is connected to the self-driving switching device 250.

[0030] A breaker 212 and a leakage circuit breaker 214 are provided in the power path 210.

[0031] The power path 220 branches from the power path 210. The power path 220 is composed of two voltage lines and one neutral line, and supplies power to the charging and power supply device 300 by a single-phase three-wire system. One end of the power path 220 is connected to the location of the power path 210 between the breaker 212 and the leakage circuit breaker 214, and the other end is connected to the charging path 320 of the charging and power supply device 300.

[0032] A high-speed and high-sensitivity type leakage circuit breaker 222 is provided in the power path 220.

[0033] The power path 230 is composed of two voltage lines and one neutral line, and receives power from the charging and power supply device 300 by a single-phase three-wire system. One end of the power path 230 is connected to the power supply path 330 of the charging and power supply device 300, and the other end is connected to the self-driving switching device 250.

[0034] The power path 240 is composed of two voltage lines and one neutral line, and supplies power to the loads 260, 265 in a single-phase three-wire system in parallel connection.

[0035] The power path 240 is connected to each of the loads 260 and 265 via breakers 270, 275.

[0036] The self - operating switching device 250 switches between a normal operation of operating the loads 260, 265 of the house 200 with the power of the power source PS and a self - operating mode of operating the loads 260, 265 of the house 200 with power supplied from the vehicle 100 (charging / power feeding device 300). Specifically, the self - operating switching device 250 switches between a state of connecting the power path 210 and the power path 240 and a state of connecting the power path 230 and the power path 240.

[0037] <Charging / power feeding device> The charging / power feeding device 300 includes a housing 302, a cable 304 extending from the housing 302, and a connector 306 connected to the tip of the cable 304. Further, the charging / power feeding device 300 includes a power path 310, a charging path 320, a power feeding path 330, a resistance circuit 340, a controller 350, and signal lines 360, 370.

[0038] The connector 306 is connected to the charging / power feeding port 170 of the vehicle 100, for example, by being inserted into the charging / power feeding port 170 of the vehicle 100. As shown in FIG. 2, the connector 306 has a known latch mechanism 306C, and when inserted into the charging / power feeding port 170, the latch mechanism 306C acts with the engaging portion of the charging / power feeding port 170 to prevent removal from the charging / power feeding port 170.

[0039] As shown in FIGS. 1 and 2, the connector 306 includes a latch release button 306A and a power feeding start button 306B. Thus, an existing connector for power feeding (see FIG. 2) can be adopted as the connector 306 in this example.

[0040] The latch release button 306A (an example of a first operation unit) is an operation unit used by a user to release the latch mechanism 306C (an example of a latch) of the connector 306 in a state where the connector 306 is connected to the charging / power feeding port 170.

[0041] The power supply start button 306B (an example of the second operation unit) is an operation unit used for the user to start power supply from the vehicle 100 to the house 200.

[0042] The power path 310 (an example of the third path) is composed of two power lines of single-phase alternating current. One end of the power path 310 is connected to the connector 306 and is connected to the power path 120 through the connector 306 and the charging / power supply port 170. Also, the other end of the power path 310 branches into a charging path 320 and a power supply path 330. That is, the charging path 320 and the power supply path 330 merge into the power path 310 toward the vehicle 100 side.

[0043] The charging path 320 (an example of the first path) is used to charge the energy storage device of the vehicle 100. The charging path 320 is composed of two power lines of single-phase alternating current and supplies the power supplied from the house 200 (power source PS) toward the vehicle 100. One end of the charging path 320 is connected to the power path 220 of the house 200, and the other end is connected to the power path 310.

[0044] Charging path 32 to 0 is provided with a relay 322 and a leakage detection device 324 in order from the power path 310 side.

[0045] Power supply path 330 (An example of the second path) is used to supply power from the energy storage device of the vehicle 100 to the house 200. The power supply path 330 is composed of two power lines of single-phase alternating current or three power lines (two voltage lines and a neutral line) and supplies the power supplied from the vehicle 100 toward the house 200. One end of the power supply path 330 is connected to the power path 310, and the other end is connected to the power path 230 of the house 200.

[0046] The power supply path 330 is provided with a relay 332, a leakage alarm device 334, a transformer 336, and a leakage circuit breaker 338 in order from the power path 310 side.

[0047] The resistance circuit 340 is a pull-down resistor of the signal line 370. One end of the resistance circuit 340 is connected to the signal line 370, and the other end is connected to the GND potential (an example of a constant voltage unit) of 0V (volt).

[0048] The controller 350 performs control regarding the charging and power feeding device 300.

[0049] For example, when an operation of selecting charging of the power storage device of the vehicle 100 is received by the controller 350 and the connector 306 is connected to the charging and power feeding port 170 of the vehicle 100, the relay 322 is shifted from the off state to the on state.

[0050] Also, for example, when an operation of selecting power feeding from the power storage device of the vehicle 100 to the house 200 is received by the controller 350 and the connector 306 is connected to the charging and power feeding port 170 of the vehicle 100, the relay 332 is shifted from the off state to the on state.

[0051] The signal line 360 is used to transmit a control signal (CPLT signal) of the controller 350 to the ECU 130 of the vehicle 100. One end of the signal line 360 is connected to the controller 350. Also, the other end of the signal line 360 is connected to the connector 306 and is connected to the signal line 140 of the vehicle 100 via the connector 306 and the charging and power feeding port 170.

[0052] The signal line 370 is used to transmit a voltage signal (PISW signal) corresponding to the resistance value of the resistance circuit 340 to the controller 350 and the ECU 130 of the vehicle 100. One end of the signal line 370 is connected to the controller 350. Also, the other end of the signal line 370 is connected to the connector 306 and is connected to the signal line 140 of the vehicle 100 via the connector 306 and the charging and power feeding port 170.

[0053] For example, as shown in FIG. 1, the charging path 320, the power supply path 330, the resistance circuit 340, and the controller 350 are mounted on the housing 302. The cable 304 includes a power path 310, signal lines 360 and 370, and a signal line of the GND potential. Thus, the configuration of this example can be realized by using an existing charging or power supply connector and cable.

[0054] [Details of the Resistance Circuit] Next, continuing with reference to FIGS. 1 and 2, the details of the resistance circuit 340 will be described.

[0055] The resistance circuit 340 includes resistance circuits 341 and 342 and a changeover switch 343.

[0056] The resistance circuit 341 (an example of a first resistance portion) is used when charging the power storage device of the vehicle 100 using the charging path 320. One end of the resistance circuit 341 is connected to the GND potential, and the other end is connected to one fixed contact of the changeover switch 343.

[0057] The resistance circuit 342 (an example of a second resistance portion) is used when power is supplied from the vehicle 100 to the house using the power supply path 330. One end of the resistance circuit 342 is connected to the GND potential, and the other end is connected to the other fixed contact of the changeover switch 343.

[0058] The changeover switch 343 (an example of a switching portion) switches between a state of connecting the signal line 370 and the resistance circuit 341 and a state of connecting the signal line 370 and the resistance circuit 342. The changeover switch 343 has a movable portion connected to the signal line 370, and a movable contact interlocking with the movable portion switches between a state of being connected to one fixed contact corresponding to the resistance circuit 341 and a state of being connected to the other fixed contact corresponding to the resistance circuit 342.

[0059] When the charging and power supply device 300 charges the power storage device of the vehicle 100, the changeover switch 343 connects the signal line 370 and the resistance circuit 341. On the other hand, when the charging and power supply device 300 supplies power from the power storage device of the vehicle 100 to the house 200, the changeover switch 343 connects the signal line 370 and the resistance circuit 342. For example, the changeover switch 343 switches between two states according to the content of the operation for selecting charging or power supply from the user to the charging and power supply device 300. At this time, the changeover switch 343 may switch between two states by directly inputting an operation signal corresponding to the operation received from the user, or may switch between two states according to a control signal from the controller 350 that captures the operation signal.

[0060] The resistance circuit 341 includes resistors 341A and 341B and a relay 341C.

[0061] The resistors 341A and 341B are connected in series between the fixed contact of the changeover switch 343 and the GND potential.

[0062] The relay 341C is provided in a path for short-circuiting between the intermediate point between the resistors 341A and 341B and the GND potential.

[0063] For example, the relay 341C is of the normally closed type, and when the latch release button 306A of the connector 306 is operated, the relay 341C shifts to the off state in conjunction with the operation. Also, when the state where the latch release button 306A is operated (pressed) is released, the relay 341C returns to the on state.

[0064] The resistance circuit 342 includes resistors 342A to 342C and relays 342D and 342E.

[0065] One end of the resistor 342A is connected to the fixed contact of the changeover switch 343, and the other end is connected to each of the resistor 342B and the relay 342D.

[0066] The resistor 342B, the relay 342D, and the resistor 342C are connected in parallel between the resistor 342A and the GND potential.

[0067] For example, the relay 342D is a normally-closed type, similar to the relay 341C. When the latch release button 306A of the connector 306 is operated (pressed), in conjunction with this operation, it shifts to the off state. Also, when the state where the latch release button 306A is operated (pressed) is released, the relay 342D returns to the on state.

[0068] The relay 342E is provided in a path that short-circuits between the midpoint between the relay 342D and the resistor 342C and the GND potential.

[0069] For example, the relay 342E is a normally-open type. When the power supply start button 306B of the connector 306 is operated, in conjunction with this operation, it shifts to the on state.

[0070] In this way, the resistance circuit 340 can vary the resistance value according to the operations of the relay 341C, the relays 342D, 342E, and the changeover switch 343.

[0071] [Operation of the Charging and Power Supply System] Next, continuing with reference to FIGS. 1 and 2, the operation of the charging and power supply system 1 will be described.

[0072] <When Connecting to the Charging and Power Supply Port of the Connector> When the connector 306 is not connected to the charging and power supply port 170 of the vehicle 100, the signal line 150 has a voltage obtained by dividing the voltage of the internal power supply of the ECU 130 by the resistors 131 and 160. Hereinafter, the range in which the voltage of the signal line 150 in this case is included is referred to as "voltage level V0".

[0073] When the connector 306 is connected to the charging / supplying port 170 of the vehicle 100, the signal line 370 of the charging / supplying device 300 and the signal line 150 of the vehicle 100 are connected, and the GND potential of the charging / supplying device 300 and the ground of the vehicle 100 are connected. Therefore, the voltage of the signal line 150 becomes the voltage obtained by dividing the voltage of the internal power supply of the ECU 130 by the parallel connection of the resistor 131, the resistor 160, and the resistor circuit 340. At this time, since the resistance value of the combined resistance of the resistor 160 and the resistor circuit 340 is smaller than the resistance value of the single resistor 160, the voltage of the signal line 150 changes in a smaller direction than when the connector 306 is not connected to the charging / supplying port 170.

[0074] Therefore, by appropriately setting the voltage level V0, the ECU 130 can detect that the connector 306 is connected when the voltage of the signal line 150 changes to be smaller than the voltage level V0.

[0075] <During charging of the vehicle's power storage device> When the connector 306 is connected to the charging / supplying port 170 of the vehicle 100 and the charging / supplying device 300 charges the power storage device of the vehicle 100, the changeover switch 343 is set to a state of connecting the signal line 370 and the resistor circuit 341. Therefore, the resistance value of the resistor circuit 340 is equal to the resistance value of the resistor circuit 341.

[0076] Since the relay 341C is normally open and in an on state, the resistance value R1 (an example of the first resistance value) of the resistor circuit 341 is equal to the resistance value of the resistor 341A. Hereinafter, the range in which the voltages of the signal lines 150 and 370 in this case can be included is referred to as "voltage level V1" (V1 < V0).

[0077] Therefore, by appropriately setting the voltage level V1, the ECU 130 can determine that the charging and power supply device 300 is charging the power storage device of the vehicle 100 when the voltage of the signal line 150 is at the voltage level V1. Therefore, the ECU 130 can control the in-vehicle charger 110 to charge the power storage device with the power supplied from the charging and power supply device 300. Further, when the charging and power supply device 300 is charging the power storage device of the vehicle 100, the controller 350 can detect an abnormality in the resistance circuit 340 by determining whether the voltage of the signal line 370 is at the voltage level V1.

[0078] Also, when the user operates the latch release button 306A, the relay 341C switches to the off state, and the resistance value R2 of the resistance circuit 341 shifts to the combined resistance value of the series connection of the resistors 341A and 341B. Therefore, the resistance value R2 of the resistance circuit 341 becomes larger than when the relay 341C is in the on state. As a result, the voltages of the signal lines 150 and 370 become larger than when the relay 341C is in the on state. The resistance value R2 is a value different from the above-described resistance value R1. Hereinafter, the range including the voltages of the signal lines 150 and 370 in this case is referred to as "voltage level V2" (V0 > V2 > V1).

[0079] Therefore, by appropriately setting the voltage level V2, the ECU 130 can detect that the latch of the connector 306 has been released when the voltage of the signal line 150 rises from the voltage level V1 to the voltage level V2. Therefore, for example, when the ECU 130 detects that the latch of the connector 306 has been released during the execution of the charging operation of the power storage device by the in-vehicle charger 110, it can forcibly stop the charging operation. Further, when the latch release button 306A of the connector 306 is operated, the controller 350 can detect an abnormality in the resistance circuit 340 by determining whether the voltage of the signal line 370 rises from the voltage level V1 to the voltage level V2.

[0080] <When feeding power from the vehicle's power storage device to a house> When the connector 306 is connected to the charging and power supply port 170 of the vehicle 100 and the charging and power supply device 300 performs power supply from the power storage device of the vehicle 100 to the house, the changeover switch 343 is set in a state of connecting the signal line 370 and the resistance circuit 342. Therefore, the resistance value of the resistance circuit 340 is equal to the resistance value of the resistance circuit 342.

[0081] Relay 34 2D is normally closed in the on state. Therefore, when the power supply start button 306B of the connector 306 is not operated, the resistance value R3 of the resistance circuit 342 is equal to the combined resistance value of the resistors 342A to 342C. The resistance value R3 is a value different from the above-described resistance values R1 and R2. Hereinafter, the range including the voltages of the signal lines 150 and 370 in this case is referred to as "voltage level V3" (V0 > V3).

[0082] Therefore, by appropriately setting the voltage level V3, the ECU 130 can recognize that the charging and power supply device 300 is in a ready state for power supply from the power storage device of the vehicle 100 to the house 200 when the voltage of the signal line 150 is at the voltage level V3. Therefore, the ECU 130 can control the in-vehicle charger 110 and proceed with the preparation for power supply from the power storage device of the vehicle 100 to the house 200. Further, when the charging and power supply device 300 is in a preparation stage for power supply from the power storage device of the vehicle 100 to the house 200, the controller 350 can detect an abnormality in the resistance circuit 340 by determining whether or not the voltage of the signal line 370 is at the voltage level V3.

[0083] In this state, when the power supply start button 306B of the connector 306 is operated, the resistance value R4 (an example of the second resistance value) of the resistance circuit 342 becomes equal to the resistance value of the resistor 342A, and changes to be smaller than before the power supply start button 306B of the connector 306 is operated. As a result, the voltages of the signal lines 150 and 370 change to be smaller than before the power supply start button 306B of the connector 306 is operated. The resistance value R4 is a value different from the above-described resistance values R1 to R3. Hereinafter, the range including the voltages of the signal lines 150 and 370 in this case is referred to as "voltage level V4" (V0 > V3 > V4).

[0084] Therefore, by appropriately setting the voltage level V4, the ECU 130 can recognize that the charging and power supply device 300 supplies power from the power storage device of the vehicle 100 to the house 200 when the voltage of the signal line 150 shifts from the voltage level V3 to the voltage level V4. Therefore, the ECU 130 can control the in-vehicle charger 110 and start supplying power from the power storage device of the vehicle 100 to the house 200. Further, when the charging and power supply device 300 supplies power from the power storage device of the vehicle 100 to the house 200, the controller 350 can detect an abnormality of the resistance circuit 340 by determining whether the voltage of the signal line 370 is at the voltage level V4.

[0085] When the user operates the latch release button 306A, the relay 342D switches to the off state, and the resistance value R5 of the resistance circuit 342 shifts to the combined resistance value of the series connection of the resistors 342A and 342B. Therefore, the resistance value R5 of the resistance circuit 342 becomes larger than when the relay 342D is in the on state, and as a result, the voltages of the signal lines 150 and 370 become larger than when the relay 342D is in the on state. The resistance value R5 is a value different from the above-described resistance values R1 to R4. Hereinafter, the range including the voltages of the signal lines 150 and 370 in this case is referred to as "voltage level V5" (V0 > V5 > V3 > V4).

[0086] Therefore, by appropriately setting the voltage level V5, the ECU 130 can detect that the latch of the connector 306 has been released when the voltage of the signal line 150 rises from the voltage level V4 or the voltage level V3 to the voltage level V5. Therefore, for example, during the power supply operation from the power storage device to the house 200 by the in-vehicle charger 110, when the ECU 130 detects that the latch of the connector 306 has been released, it can forcibly stop the power supply operation. Further, when the latch release button 306A of the connector 306 is operated, the controller 350 can detect an abnormality in the resistance circuit 340 by determining whether the voltage of the signal line 370 rises from the voltage level V3 or the voltage level V4 to the voltage level V5.

[0087] The respective resistance values of the resistors 131, 160, 341A, 341B, 342A to 342C are appropriately set so that the resistance values R1 to R5 of the resistance circuit 340 corresponding to the respective voltage levels V1 to V5 are different from each other. Further, the respective resistance values of the resistors 131, 160, 341A, 341B, 342A to 342C are appropriately set so that the voltage levels V1 to V5 do not overlap with each other. Thereby, the ECU 130 can appropriately make the above-described determination by comparing the voltage of the signal line 150 with each of the voltage levels V0 to V5. Further, the controller 350 can appropriately determine the presence or absence of an abnormality in the resistance circuit 340 by comparing the signal line 370 with each of the voltage levels V0 to V5.

[0088] As described above, the charging / power supply device 300 includes a changeover switch 343 that is connected to the GND potential and switches a state of connecting either one of the resistance circuits 341 and 342 having different resistance values R1 and R4 to the signal line 370.

[0089] As a result, the charging and power feeding device 300 can change the voltage of the signal line 370 when the resistance circuit 341 is connected to the signal line 370 and when the resistance circuit 342 is connected to the signal line 370. Consequently, the charging and power feeding device 300 can notify the ECU 130, based on the voltage of the signal line 150 connected to the signal line 370, whether to charge the power storage device of the vehicle 100 or feed power from the power storage device of the vehicle 100 to the house 200. Therefore, for example, the charging and power feeding device 300 does not need to notify the ECU 130 whether to charge the power storage device of the vehicle 100 or feed power from the power storage device of the vehicle 100 to the house 200 through communication using a predetermined frame. Also, for example, the charging and power feeding device 300 does not need to prepare charging and power feeding connectors and notify the ECU 130 whether to charge the power storage device of the vehicle 100 or feed power from the power storage device of the vehicle 100 to the house 200 based on the type of the connected connector. Thus, the charging and power feeding device 300 can more simply notify the vehicle side of the operation to be performed among the charging operation and the power feeding operation, and can suppress, for example, an increase in the number of components due to addition of a communication function or adoption of charging and power feeding connectors.

[0090] [Other Embodiments] Next, with reference to FIG. 3, other embodiments will be described.

[0091] FIG. 3 is a perspective view showing another example of the connector 306. Specifically, FIG. 3 is a diagram showing a specific example of a charging connector that can be adopted as the connector 306.

[0092] The above-described embodiments may be appropriately modified or changed.

[0093] For example, as shown in FIG. 3, in the above-described embodiment, the power feeding start button 306B may be omitted. Thereby, an existing charging connector can be used as the connector 306. In this case, the resistor 342C and the relay 342E are omitted.

[0094] Although the embodiments have been described in detail above, the present disclosure is not limited to such specific embodiments, and various modifications and improvements are possible within the scope of the gist described in the claims.

Description of Reference Numerals

[0095] 1 Charging and Power Supply System 100 Vehicle 110 On-vehicle Charger 120 Power Path 130 ECU 131 Resistor 140 Signal Line 150 Signal Line 160 Resistor 170 Charging and Power Supply Port 200 House 300 Charging and Power Supply Device 302 Housing 304 Cable 306 Connector 306A Latch Release Button 306B Power Supply Start Button 306C Latch Mechanism 310 Power Path 320 Charging Path 330 Power Supply Path 340 Resistor Circuit 341 Resistor Circuit 341A, 341B Resistors 341C Relay 342 Resistor Circuit 342A~342C Resistors 342D, 342E Relays 343 Changeover Switch 350 Controller 360, 370 Signal Lines PS Power Supply

Claims

1. A housing, a cable provided to extend from the housing, a connector provided at the tip of the cable and connected to a power interface of an electric vehicle having a power storage device, a latch provided on the connector to prevent removal from the power interface, an operation unit provided on the connector to release the latch, a first path provided inside the housing to supply power from a predetermined power source to the electric vehicle through the connector and charge the power storage device, a second path provided inside the housing to supply power from the power storage device to the outside of the electric vehicle through the connector, a third path provided on the cable, in which the first path and the second path are joined together, a signal line connected to the electric vehicle through the connector, a first resistor unit provided inside the housing, one end of which is connected to a constant voltage unit and which has a first resistance value, a second resistor unit provided inside the housing, one end of which is connected to the constant voltage unit and which has a second resistance value different from the first resistance value, provided inside the housing, and a switching unit that switches the state of connecting the signal line to either the other end of the first resistor unit or the other end of the second resistor unit, The first resistor unit changes its resistance value only between the first resistance value corresponding to the state where the connector is attached to the power interface and the latch is effective, and the third resistance value different from the first resistance value corresponding to the state where the latch is released. The second resistor unit changes its resistance value only between the third resistance value corresponding to the state where the connector is attached to the power interface and the latch is effective, and the fourth resistance value different from the second resistance value corresponding to the state where the latch is released. A charging / power supply device.

2. When the signal line and the other end of the first resistor unit are connected by the switching unit, the first resistor unit changes its resistance value from the first resistance value to the third resistance value in conjunction with the operation of releasing the latch with respect to the operation unit. When the signal line and the other end of the second resistor unit are connected by the switching unit, the second resistor unit changes its resistance value from the second resistance value to the fourth resistance value in conjunction with the operation of releasing the latch with respect to the operation unit. The charging / power supply device according to Claim 1.

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